Old Montenegro (Serbian: Стара Црна Гора, romanized: Stara Crna Gora), also known as Montenegro proper (Serbian: Права Црна Гора, romanized: Prava Crna Gora), or True Montenegro (Serbian: Истинска Црна Гора, romanized: Istinska Crna Gora), is a term used for the embryonic part of modern Montenegro. In historical context, the term designates the original territory of the Principality of Montenegro, before the territorial expansion, ratified by the Congress of Berlin in 1878, or even more precisely - the territory of the Prince-Bishopric of Montenegro prior to its unification with the region of Brda in the first half of the 19th century.